Expand Configuration and Management Manual (G06.24+)

Configuring Expand-Over-X.25 Lines

Expand Configuration and Management Manual—523347-008

10-13

Step 6: Start the Expand-Over-X.25 Line

To start an Expand-over-X.25 line, use the Expand subsystem SCF START LINE

command. The command syntax is as follows:

device_name

is the device name of the Expand-over-X.25 line-handler process.

The successful completion of this command leaves the line in the STARTED state.

Profile Modifiers

This subsection lists the recommended modifiers for Expand-over-X.25 line-handler

processes and describes the modifiers provided for configuring special features. It also

describes default values and value ranges for all the modifiers contained in the

PEXQSNAM profile.

Recommended Modifiers

Recommended modifiers are modifiers that should be used to obtain optimum

performance and efficiency. The following modifier is recommended for Expand-over-

X.25 line-handler processes:

L4TIMEOUTn

Default: 2000 (20 seconds)

Units: 0.01 seconds

Range: 500 through 32,767 (5.00 seconds through 5.27.67 minutes)

This modifier specifies the time interval, in one-hundredth of a second increments, that

the Expand-over-X.25 line-handler process will wait for a response to an end-to-end

(Layer 4) request before retrying. L4TIMEOUT should be the same for every Expand

line-handler process in the network.

If a message is not acknowledged within the L4TIMEOUT period, an enquiry (ENQ) will

be initiated. Because retransmissions of an X.25 network can degrade response time,

cause network link congestion, or result in excessive packet charges, you should set

L4TIMEOUT to a value in excess of the maximum anticipated response time on a

loaded link.

START LINE $device_name

Note. A different profile is provided for Expand-over-X.25 lines that are part of a multi-line

path; this profile is described in Section 14, Configuring Multi-Line Paths.

Note. The Expand End-to-End protocol is explained in Path Function of the Expand

Subsystem on page 18-13.